Artery Cerebral Rostral

The rostral cerebral artery or a.cerebralis rostradalis is the largest branch of a. carotis externae. Its origin is in the upper parts of the pia mater, reaching the lower border of the anterior edge of the pons, and there it goes downwards and connects with the posterior cerebral artery at the level of the anterior leg of the fornix of the pons. Along its route it often winds, forming vascular anastomoses with other arteries. Sometimes the artery is exposed through a defect in the tegmentum of the bridge or a hole in it. Venous drainage from the brain stem is carried out primarily by the posterior pontine vein, which flows into the veins of the meninges and sinuses. A few small venous vessels duct and anastomose with the veins of the dura mater of the spinal cord and the cranial cavity.